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Power battery pack

A technology for power battery packs and single cells, which is applied to battery pack parts, secondary battery manufacturing, circuits, etc. It can solve problems such as damage to connections, looseness, and impact on battery output performance, ensuring reliability and small internal resistance , Optimizing the effect of power output performance

Active Publication Date: 2010-06-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this patent, since the sheet electrode terminals 1 and 2 are directly connected together by welding, there is no buffer between the two, so when the battery pack is hit by an external force, due to the electrode terminals 1, 2 2 The load borne cannot be buffered, and the connected electrode terminals 1 and 2 will interact with each other, so that the electrode terminals 1 and 2 are easily damaged and the connection will be loosened or even disconnected, which will affect the output performance of the battery. Reliability is also greatly reduced

Method used

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as Figure 5 As shown, the power battery pack includes a plurality of single cells 5, and the single cells 5 may be various single cells suitable for forming a power battery pack, such as alkaline secondary batteries, lithium-ion batteries, and the like. Each single battery 5 has a positive terminal 1 and a negative terminal 2, and the single batteries 5 can be connected in series or in parallel by various known methods or connection sequences. exist Figure 5 Among them, the single cells 5 are connected in series, one electrode terminal of one single cell 5 is connected to the opposite polarity electrode terminal of another adjacent single cell 5 , and the other electrode terminal of the other single cell 5 One electrode terminal is in turn connected to the opposite polarity electrode terminal of the next adjacent unit cell 5 , ...

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Abstract

The invention provides a power battery pack with reliable connection and excellent electric power output performance, comprising: a plurality of single batteries (5), which are interconnected in serial or parallel via flaky electrode terminals (1, 2), wherein the electrode terminals (1, 2) are interconnected via an intermediate connector (3) with the function of buffer, and the connection relationship between the electrode terminals (1, 2) and the intermediate connector (3) is adherence connection. The intermediate connector (3) with the function of buffer can buffer stress when the electrode terminals (1, 2) receive load impact, thereby guaranteeing the reliable connection between the electrode terminals (1, 2). In addition, according to the invention, the power battery pack can include the function of automatic disconnection upon overheating by manufacturing the intermediate connector (3) with memory alloy material or in a structure of double metal sheets. The power battery pack is mainly applied to electric / hybrid cars.

Description

technical field [0001] The invention relates to a power battery pack, which includes a plurality of single cells connected in series or in parallel through electrode terminals to form a power battery pack. Background technique [0002] In today's society, with the improvement of people's living standards, the number of cars is also increasing year by year. Exhaust emissions caused by fuel vehicles are an important factor in environmental pollution. Therefore, new energy vehicles such as electric vehicles or hybrid vehicles emerge as the times require, and they represent a development direction of future automobiles. [0003] In electric vehicles, the core is the power battery pack as the power source. At present, lithium-ion batteries have become the preferred power source for people due to their advantages such as high energy density, safety, and small size. The single cells of the power battery pack can be connected in series or in parallel to form a power battery pack ...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M2/20H01M50/509
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 郑卫鑫朱建华潘丽英
Owner BYD CO LTD
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